Subscribe! Want more math video lessons? Visit my website to view all of my math videos organized by course, chapter and section. The purpose of posting my free video tutorials is to not only help ...

Learn how to add or subtract radicals. A radical is a number or an expression under the root symbol. Radicals can only be ...

Over the three years Jordan Ellenberg was writing his book, he repeatedly encountered the same reaction to its subject. “I’d be at a party, and I’d tell someone what my book was about, and then I’d be ...

As nine students cluster in a semi-circle in Gail Younie’s cozy summer school classroom at Stephensen Elementary in Southwest Portland, the baggies full of brightly-colored two-dimensional Styrofoam ...

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